Im will be defeated and so will the system of Celestial Dragons and unfit world nobles.
The Five Elder Stars will be defeated and no longer exist.
CP0-CP9 will be dissolved and replaced with/by Sword.
Akainu will die after losing to luffy by risking his life to kill Luffy in a villainous way and failing.
Since Kizaru Ryokugyu and Fujitora are not necessarily evil/want absolute justice but are not switching sides yet they will have to fight against the good guys in the end, and lose but they’ll also want to quit the Marines.
Garp and Tsuru will be too old to fight in the final major battle and quite like Sengoku.
*All six of them can be or are members of Sword. But since they are older characters, they will probably not fight anymore.
Aokiji will be fleet admiral and leader of Sword if he isn’t already.
Koby Hellmepo and Tashigi being fully grown will be the final three admirals and leaders of Sword.
Hina Sentomaru Gion and Chaton will be vice admirals and captains of Sword
Fullbody, Jango, Regis, Toma, Grount, Bingham, and Zappa will all be captains.
The rest of the marines will be where they are now.
X Drake will continue working undercover for Sword and pirating.
And of course Smoker will have joined the straw hats!
Honorable Sword predictions: Dragon Kuma Dr. VegaPunk Kong Stussy and the tall member of the Gorosei.
Former marines (Deceased) who could have been members of Sword: Corazon, Bellemere, Nico Olvia, Saul, and Diez Barrels.